Tempering mechanism



Jan. 1925- 1,522,971

S. T. NELSON TEMPERING MECHANISM Filed Aug. 7, 1922 SVEN T. NELSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO SULLIVAN MACHINERY COM- iszaan r Fr mm, A ooarona'rron or massacnosnrrs.

TEMPERING MECHANISM.

Application filed August 7, 1922, Serial No. 580,239.

To all whom it may concern:

Be it known that I, SVEN T. Nelson, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Tempering Mechanism, of which the following is a full, clear, and exact specification.

My invention relates to tempering mechanism for mining machine cutter bits.

It has for its object to provide an improved tempering mechanism for such bits whereby, as distinguished from subjecting the entire bit to the tempering process as heretofore, it is made possible to temper only the working end or point of the bit and thereby materially improve the effectiveness of the bit by maintaining the body of the same relatively soft in such manner that the set screws holding the bit in position during cutting, as for instance when used in a mining machine cutter chain, may better grip the bit and as a result hold it more firmly in position on its link.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,

Fig. 1 is a diagrammatic side elevation partially in section of my improved mechanism, showing a furnace and my tempering mechanism arranged beside-the same.

Fig. 2 is a detail view of a portion of the conveyor, showing the bit carrying means thereon. V

Fig. 3 is a transverse section of the conveyor shown in Fig. 2 showing a bit in posi tion thereon.

In this illustrative construction, I have shown my tempering mechanism used in connection with a bit heating furnace 1 which may be of any suitable form and is preferably located adjacent the tempering mechanism so that an operator may remove the bits from the furnace and conveniently place them upon a moving part of the tempering mechanism.

As shown, this mechanism is entirely automatic and comprises a conveyor 2 in the form of a flat, elongated, metal strip having upstanding bit receiving stall forming members 3 spaced along the working face thereof and power driving and guiding means herein including one or more suit able power sprockets 4:, herein two, driven from a suitable source of power at a suitable speed, and a plurality of guiding sprockets 5 so disposed as to direct the conveyor from apoint adjacent the furnace operators station laterally and downward into a suitable bath 6 such, for example, as a water bath, with only the tips of the bits entering the liquid'and then upward from that bath and over an incline and downward into another suitable bath 7, such as an oil bath, through which the bits are similarly passed with only their tips engaging the liquid, the conveyor discharging the bits automatically into a suitable receptacle 8 after they have passed out of the bath 7 and then following a path beneath the baths '7 and 6, respectively, back to the starting point. p

As a result of my improvement, it will be noted that the difiiculty heretofore resulting from tempering the entire bits and the consequent production of bits having hard shanks difficult for the set screws to grip, has been eliminated, only the tips of the bits in my improvedconstruction being subjected to the bath or baths. It will further be observed that as a result of my improved construction, it is possible, by regulating the speed of the conveyor or the path thereof, to regulatethe time that the bits are subjected to any bath.

IVhile I have in this application specifical ly described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a tempering mechanism for blanks, a tempering bath, and a conveyor for moving and entirely supporting a blank in such manner that only the end is immersed.

2. In a tempering mechanism for blanks, a tempering bath, and a conveyor to move and entirely support a series of blanks adj acent s'aid bath so that only the ends are immersed.

3. In a tempering mechanism for blanks, a tempering bath, and means above said bath to move and entirely support a series of blanks successively above said bath so that only the ends are immersed.

4. I11 a tempering mechanism for blanks having laterally extending ends, a tempering bath, and means above said bath to move and entirely support a series of blanks. successively above said bath so that only said ends are immersed.

5. In a tempering mechanism for blanks having laterally extending ends, a tempering bath, and a conveyor having blank receiving means disposed thereon adapted to support a series of blanks above said bath so that only said ends are immersed. i

6. A temperingmechanism for mining machine cutter bits comprising a conveyor system having provision for supporting abit Withits point disposed below the conveyor, a' bath, and means for passing said conveyor over a bath in such manner that only the point of the bit is immersed.

7. In a temperingmechanism for mining machine cutter hits, a tempering bath, a conveyor having provision for supporting and, moving a series of bits over said bath so that only the points are immersed, and

guiding and driving means for said COIL'.

veyor,

8. In a. tempering mechanism for mining machine cutter bits, a tempering bath, a conveyor, bit holding means formed on said conveyor, means to'move said conveyor over said bath so that only the points of the bits areimme'rsed, and means to automatically discharge said bits.

9. -A tempering mechanism for cutter bits comprising a conveyor system having pro vision for supporting a bit with its .point disposed below the conveyor, a plurality of baths, and means for passing said conveyor successively over said baths in such manner that only the point of the bit is immersed.

10. A tempering mechanism for cutter bits comprising a conveyor system having provision for supporting a bit with its'point disposed below the conveyor, a Water bath, an oil bath, a bit receptacle, and means for passing said conveyor relative to said elements in such manner that the point only of a bit 15 mmersed 1n said water and oil baths successively and that the bit 15 subse-' quently discharged into said receptacle.

11. In a tempering mechanism for blanks,

a tempering bath, means to moveand enentirely support a series'ot' blanks adj acentsaid bath in such manner that only a portion of the blanks'are immersed, said means comprising a flexible endless conveyor.

13. In a tempering mechanism for blanks having projecting portions formed thereon, a tempering bath, and a 'conv eyor adapted to support entirely a series of blanks above said bath so that only the projecting portions are immersed, said conveyor having: means formedthereon engagingthe sides of said blanks to position the latter;

1%. Ina tempering mechanismrfor blanks having downwardly extending portions formed thereon, a tmperingbath, and means above said bath to moveandientirely support a series of blanks successively above said'batlrwi'th said portions projecting from said means so that only said portions are immersed. y

' 15. In a temperingmechanism for blanks,

a. tempering bath, a conveyor [having pro-j vision for entirely supporting and movinga is immersed, and guiding and drivingmeans for saidconveyor.

16.. In a tempering mechan sm.foi'iblanks a tempering bath, a conveyor having" pro-1 vision for supporting and moving a series of blanks; ad acent. said bathso that only a 'portion isimmersed, said'conve-yor having apertures formed therein, andguiding and driving 'means' for saidbconveyor including sprockets cooperatingwitlrsaid apertures.

17.1 In a temperingfmechanism for. cutter bits comprising a. ,'conveyor;system having provision'for supporting shits with their points projectingdaterally from said-conveyor, a tempering bath, and means toi'v moving" and supporting :said bits in such manner that: only the, points of the bits. are

immersed. V i -Inl t6'Stl111'O I'1yWllGIBOf I ailix my s gnature.

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